Mill.



S. GRASSI.

MILL.

APPLICATION FILED IULY|9.19I7.

Patented J um. 11, 1918. 2 SHEETS SHEET! dd M S. GRASSII.

. MILL.

APPLICATION FILED JULY 19. HI- 1 111',%Q% Patented J 11110 11. 1918.

2 SHEETSSHEET 2.

u see SEBASTIANO GRASSL F RIDGEFIELD, CONNECTICUT.

MILL.

Specification of Letters Patent.

Patented June 1111, 119th.

Application filed July 19,-1917. Serial No. 181,469."

' in the specific construction and arrangement are of parts herein described and claimed, a distinctive feature'being the mounting of a plurality :of peripherally and spirally grooved rolls on the main grinding cylinder, as hereinafter fully set forth.

In the accompanying drawings,

Figure 1, is a side. elevation ofmy versatile farm mill;

Fig. 2, is anisometrical view of a feed. box used in connection therewith,

Fig. 3, a central vertical sectional elevation of. the apparatus as set forgrinding corn, oats or other grain;

Figs. 4, and 5, are detail views of the grain grinding roll;

Fig. 6, a detail view of one of the spirally grfoved rollers used in the grain grinding ro l.

f, 7", represent the framework of the appa'ratus supporting-what may be designated as the table f, and the shelf f Interposed between the table f, and the shelf 7, and rigidly secured to both is the casing 71., in which are housed the main crushing roll C, and the reducing rolls r,,r These rolls are mounted on shafts 1- 1*, suitably journaled in the casing h. D, is a driving shaft mounted in suitable bearings on the shelf member 7, and provided with a balance fiy' wheel 03, which may also be used as a belt pulley if it is desired to drive the apparatus b auxiliary power instead of manually, for w hich latter purpose a crank-d is provided.

In the arrangement shown in the drawings the crank handle d, is attached directly to the driving gear d, which meshes with a pinion W, on the protuberant end of the roll shaft 9, thereby driving the roll 7",

in the direction indicated by arrows in the longitudinal section Fig. 3. The other reducing roll 7"., is driven in the opposite direction by reason of the peripheral engagement of its teeth with those on the reducingroll 1' The main crushing roll C, is driven by the gear 03 by reason of the engagement of said gear (P, with the pinion 0, secured to the protuberant end of the shaft 0, on

which said main crushing roll C, is mounted.

B, is a feed box which may be used in connection with the hopper member A, it being formed with convergent sides and bottom which pass the material to the exit opening I), provided with a spring door Z), which controls the discharge of material into the feed passage a. of the hopper member A.

T, is a tub or other suitable receptacle for receiving the crushed material from the chute h, which forms the lower part of the casing h, and by means of which ground.

pomace may be transferred to the strainer S. in which it is pressed by means of a follower P, actuated by a screw 19, engaging with a stationary nut N, affixedto the frame work.

When grain is to be ground as corn, cats, or in fact any material which it is desired to reduce to pulverized form, the crushing roll C, shown in Figs. 3 to 6, inclusive, is formed with a plurality of equidistant recesses or pockets in which are mounted spirally grooved rollers 0 0 which act in conjunction with the corrugated surface h of the casing h, to reduce the grain to. an impalpable powder,the rollers 0 rolling along said corrugated surface 71. so that they rotate in a direction opposite to that of the rotation of the cylinder C, in which they are mounted, and hence retard the passage of the material over said corrugated surface If, in such manner as to subject it to a maxivmum of attritive action in which the edges In apparatus of the character designated, peripherally and spirally grooved grinding in combination, a suitable frame, a roll casrolls, and means for rotating said grinding lng supported thereon, and formed with a roll, for the purpose described. 10 corrugated attritive surface, a hopper mem- SEBASTIANO GRASSI.

5 her arranged to feed reducible material to Witnesses:

said roll easing, a grinding roll in said cas- FRANCIS A. CASTELLANO, Jr.,

ing carrying mounted therein a plurality of PETER J. BBANCATO. 

